My informed guess... though it's hard to see the colour
The last two are definitely the 'wood ant' (or a tiny chance of being a carpenter ant worker of the species Campono
tus vicinus, but I still feel it's the wood ant due to the abdomen and red legs), both of which are very common here in Canada. I've always known the first two to be queens of the species 'common black ant' (tonnes in my area and very abundant).
Hope this helps and others can help.
Mikey
